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December 21, 2014

Homework Help: physics

Posted by Teri on Friday, April 20, 2012 at 9:26pm.

A pulley with diameter D = 27in weighs 80 lb. It is mounted on a diameter d = 2-in axle. A weight of 1000 lb is to be lifted. If the coefficient of friction f = 0.1, what vertical pull force P will be needed?

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